scholarly journals Andropogon bicornis L. (Poales: Poaceae): a stink bug shelter in the soybean and corn off-season in southern Brazil

2019 ◽  
Author(s):  
Eduardo Engel ◽  
Mauricio Paulo Batistella Pasini ◽  
João Fernando Zamberlan ◽  
Rafael Pivotto Bortolotto ◽  
Roberta Cattaneo Horn ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Population Density ◽  
Host Plants ◽  
Pearson Correlation ◽  
Stink Bug ◽  
Southern Brazil ◽  
Abundance Distribution ◽  
Pest Insects ◽  
Euschistus Heros ◽  
Area Data

AbstractAssociated host plants promote the survival of various species of pest insects during unfavorable periods. The objective of this study was to evaluate the diversity, abundance and structure of the pentatomid bugs community during the soybean and corn off-season in Andropogon bicornis L. (Poales, Poaceae) plants. The experiment was carried out in the municipality of Cruz Alta, RS, Brazil. During the soybean and corn off-season from 2014 to 2018, clumps of 10 to 50 centimeters in diameter were observed around the growing area. Data on the number of species and abundance of individuals were used for statistical analysis (ANOVA, linear regression and Pearson correlation) and faunistic (diversity and abundance distribution). At the end of the experiment 4050 adults belonging to the species Euschistus heros (F.), Dichelops furcatus (F.), Dichelops melacanthus (Dallas), Edessa meditabunda (F.), Edessa ruformaginata (De Geer) and Piezodorus guildini. Among the species, we found greater abundance for E. meditabunda, E. heros and D. furcatus (96.07%) of the individuals sampled. Higher interspecific correlation was observed between the same species, we also observed a direct effect of the clump diameter on the population density. Among the six species observed, at least five are economically important for soybean and corn crops, so further studies are needed in order to verify the effects of this hibernation site on the population present in the crop and its damages.

scholarly journals Chloris distichophylla Lag. (Poaceae) as stink bug (Pentatomidae) shelter in soybean and corn off-season in southern Brazil

2019 ◽  
Author(s):  
Eduardo Engel ◽  
Mauricio P. B. Pasini ◽  
Daniele C. Hörz ◽  
Rafael P. Bortolotto
Keyword(s):  
Data Analysis ◽  
Population Density ◽  
Stink Bug ◽  
Stink Bugs ◽  
Southern Brazil ◽  
Euschistus Heros ◽  
Composition Structure

AbstractThe objective of this study was to evaluate the composition and abundance of dormant bedbugs in Chloris distichophylla Lag (Poales: Poaceae) over the soybean and corn off-season. The work was carried out in the municipality of Cruz Alta, over the soybean and corn off-season between 2014 and 2018. Plants of C. distichophylla with different clump diameter were sampled, and the bugs contained in them were counted and submitted to data analysis for the evaluation of the composition, structure, and diversity of occurring species. At the end of the experiment, 3543 hibernating adults were counted and divided into six species: Euschistus heros (F.), Dichelops furcatus (F.), Dichelops melacanthus Dallas, Edessa meditabunda (F.), Edessa ruformaginata (De Geer) (Hemiptera: Pentatomidae). The species E. heros was the most abundant, followed by D. furcatus. The diameter of the clumps directly affects the population density of the stink bugs. Finally, C. distichophylla is shown as a hibernate favorable to the maintenance of the stink bug populations over the soybean and corn off-season.

scholarly journals Saccharum angustifolium (Nees) Trin. (Poales: Poaceae) as hibernacle for stink bugs during the soybean and corn off-season in Southern Brazil

2019 ◽  
Vol 86 ◽  
Author(s):  
Eduardo Engel ◽  
Mauricio Paulo Batistella Pasini ◽  
José Luiz Tragnago ◽  
Daniele Caroline Hörz ◽  
Nadiel Augusto Kist ◽  
...  
Keyword(s):  
Population Density ◽  
Direct Effect ◽  
Host Plants ◽  
Economic Importance ◽  
Stink Bugs ◽  
Southern Brazil ◽  
Key Factors ◽  
True Bugs ◽  
Euschistus Heros

ABSTRACT Host plants are key factors in the survival of true bugs during unfavorable periods. The objective of this study was to evaluate the composition, diversity and abundance of pentatomid bugs in Saccharum angustifolium (Nees) Trin. (Poales: Poaceae). Plants were evaluated during the soybean and corn off--season for five years. A total of 250 plants were sampled, the true bug population was counted and used for statistical and faunistic analysis. We observed the occurrence of the species: Euschistus heros (F.), Dichelops furcatus (F.), Dichelops melacanthus (Dallas), Edessa meditabunda (F.), and Edessa ruformaginata (De Geer). Among the species, the highest population density was verified for E. meditabunda, E. heros, and D. furcatus. We also observed a direct effect of the clump diameter on the population density of E. heros, D. furcatus, and E. meditabunda. Finally, we conclude that S. angustifolium plants serve as adequate hibernacles for the survival of true bugs of economic importance during the soybean and corn off-season.

scholarly journals Diversity of stink bugs (Pentatomidae) in Chloris distichophylla Lag. (Poaceae) overwintering

2019 ◽  
Vol 1 ◽  
pp. ec01007
Author(s):  
Eduardo Engel ◽  
Mauricio P. B. Pasini
Keyword(s):  
Population Density ◽  
Rio Grande ◽  
Stink Bug ◽  
Stink Bugs ◽  
Rio Grande Do Sul ◽  
Euschistus Heros ◽  
Piezodorus Guildinii

The objective of this study was to evaluate the diversity and abundance of stink bugs in Chloris distichophylla Lag (Poales: Poaceae) during the soybean and corn off-season. The work was carried out in the municipality of Cruz Alta, Rio Grande do Sul state, over the soybean and corn off-season between 2014 and 2018. 3543 adults were identified into six species: Euschistus heros (Fabricius, 1798), Dichelops furcatus (Fabricius, 1775), Dichelops melacanthus (Dallas, 1851), Edessa meditabunda (Fabricus, 1794), Edessa ruformaginata (De Geer, 1773) and Piezodorus guildinii (Westwood, 1837) (Hemiptera: Pentatomidae). E. heros was the most abundant, followed by D. furcatus. The diameter of the clumps directly affects the population density of the stink bugs. Finally, C. distichophylla is shown as favorable to the maintenance of the stink bug populations over the soybean and corn off-season.

scholarly journals Statistical Analysis and Machine Learning Prediction of Fog-Caused Low-Visibility Events at A-8 Motor-Road in Spain

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 679
Author(s):  
Sara Cornejo-Bueno ◽  
David Casillas-Pérez ◽  
Laura Cornejo-Bueno ◽  
Mihaela I. Chidean ◽  
Antonio J. Caamaño ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Probability Distributions ◽  
Pearson Correlation ◽  
Likelihood Method ◽  
Neural Network Approach ◽  
Event Duration ◽  
Full Characterization ◽  
Low Visibility ◽  
Learning Machine ◽  
The Impact

This work presents a full statistical analysis and accurate prediction of low-visibility events due to fog, at the A-8 motor-road in Mondoñedo (Galicia, Spain). The present analysis covers two years of study, considering visibility time series and exogenous variables collected in the zone affected the most by extreme low-visibility events. This paper has then a two-fold objective: first, we carry out a statistical analysis for estimating the fittest probability distributions to the fog event duration, using the Maximum Likelihood method and an alternative method known as the L-moments method. This statistical study allows association of the low-visibility depth with the event duration, showing a clear relationship, which can be modeled with distributions for extremes such as Generalized Extreme Value and Generalized Pareto distributions. Second, we apply a neural network approach, trained by means of the ELM (Extreme Learning Machine) algorithm, to predict the occurrence of low-visibility events due to fog, from atmospheric predictive variables. This study provides a full characterization of fog events at this motor-road, in which orographic fog is predominant, causing important traffic problems during all year. We also show how the ELM approach is able to obtain highly accurate low-visibility events predictions, with a Pearson correlation coefficient of 0.8, within a half-hour time horizon, enough to initialize some protocols aiming at reducing the impact of these extreme events in the traffic of the A-8 motor road.

scholarly journals Are metric parameters sufficient alone in evaluation of the patellar instability? New angular measuring parameters

2017 ◽  
Vol 25 (1) ◽  
pp. 230949901668449 ◽  
Author(s):  
Alper Deveci ◽  
Deniz Cankaya ◽  
Serdar Yilmaz ◽  
Ersin Celen ◽  
Bulent Sakman ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Strong Correlation ◽  
Patellar Instability ◽  
Pearson Correlation ◽  
Trochlear Groove ◽  
Rotational Movement ◽  
Pearson Correlation Test ◽  
Angular Measuring ◽  
Metric Measurement ◽  
Tibia Shaft

Purposes: When the evaluation of patellar instability is examined from the aspect of the conical-cylindrical anatomy of the tibia, metric measurement parameters such as the tuberositas tibia (TT)–trochlear groove (TG) and patellar tendon (PT) insertion–trochlear groove (TG) distances are not sufficient. We asked whether defined angular parameters reveal the rotational movement of the tuberositas tibia on the tibia shaft, additional to the metric parameters and there is a correlation between the metric and angular parameters. Methods: 19 patients with patellar instability and 22 patients without patellar instability were evaluated. For all patients, two angle and three length parameters were evaluated on the slices taken. Evaluations were made of the TT-TG, the midpoint of the PT insertion-TG distances, the anatomic midpoint of the dome of the TT-TG, the TG-PT angle, and the TG-dome angle (DA). The Pearson correlation test was used for the statistical analysis of correlations between groups. Results: A statistically significant increase was determined in the patellar instability group in the TG-DA and TG-PT angle values compared to the group without patellar instability ( p < 0.05). In both groups, a positive and strong correlation was determined between the TT-TG and the TG-PT and dome of the TT-TG distances, but no statistically significant correlation was determined between the tuberositas TT-TG and TG-PT angle and TG-DA. Conclusion: Metric parameters may not be sufficient alone in the evaluation of patellar instability. Metric parameters should be supported by additional angular parameters which reveal the rotational movement of the TT on the tibia shaft.

scholarly journals The COVID-19 Pandemic Situation in Malaysia: Lessons Learned from the Perspective of Population Density

2021 ◽  
Vol 18 (12) ◽  
pp. 6566
Author(s):  
Siew Bee Aw ◽  
Bor Tsong Teh ◽  
Gabriel Hoh Teck Ling ◽  
Pau Chung Leng ◽  
Weng Howe Chan ◽  
...  
Keyword(s):  
Population Density ◽  
Pearson Correlation ◽  
Strong Relationship ◽  
Lessons Learned ◽  
P Value ◽  
Population Census ◽  
Infection Rates ◽  
Health Official ◽  
Contagious Diseases ◽  
Spatio Temporal

This paper attempts to ascertain the impacts of population density on the spread and severity of COVID-19 in Malaysia. Besides describing the spatio-temporal contagion risk of the virus, ultimately, it seeks to test the hypothesis that higher population density results in exacerbated COVID-19 virulence in the community. The population density of 143 districts in Malaysia, as per data from Malaysia’s 2010 population census, was plotted against cumulative COVID-19 cases and infection rates of COVID-19 cases, which were obtained from Malaysia’s Ministry of Health official website. The data of these three variables were collected between 19 January 2020 and 31 December 2020. Based on the observations, districts that have high population densities and are highly inter-connected with neighbouring districts, whether geographically, socio-economically, or infrastructurally, tend to experience spikes in COVID-19 cases within weeks of each other. Using a parametric approach of the Pearson correlation, population density was found to have a moderately strong relationship to cumulative COVID-19 cases (p-value of 0.000 and R2 of 0.415) and a weak relationship to COVID-19 infection rates (p-value of 0.005 and R2 of 0.047). Consequently, we provide several non-pharmaceutical lessons, including urban planning strategies, as passive containment measures that may better support disease interventions against future contagious diseases.

scholarly journals Diapause and different seasonal morphs of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) in Northern Paraná State

2000 ◽  
Vol 29 (2) ◽  
pp. 205-218 ◽  
Author(s):  
Ana P. M. Mourão ◽  
Antônio R. Panizzi
Keyword(s):  
Mangifera Indica ◽  
Reproductive Organs ◽  
Stink Bug ◽  
Ligustrum Lucidum ◽  
Mango Tree ◽  
Euschistus Heros ◽  
Males And Females ◽  
Fallen Leaves ◽  
Diapause Incidence ◽  
In The Beginning

The Neotropical brown stink bug, Euschistus heros (Fabr.), was collected on sunflower [Helianthus annuus (L.)], soybean [Glycine max (L.) Merrill], star bristle [Acanthospermum hispidum (DC.)], and under fallen leaves of mango tree [Mangifera indica (L.)] and privet (Ligustrum lucidum Ait.), during one year, to evaluate the diapause incidence and the occurrence of different seasonal morphs. The majority of the insects (ca. 90%) with mature reproductive organs was observed during the summer (December-March), when E. heros was found on soybean or on sunflower; in the beginning of autumn, most insects (87%) showed immature reproductive organs, and they were found on star bristle and under fallen leaves. Bugs with mature reproductive organs had more developed shoulders (3.23 and 3.27 mm, for males and females, respectively) than bugs with immature organs (2.91 and 2.89 mm, for males and females, respectively). Two distinct body colors, dark brown and reddish brown, were observed. Nevertheless, the reddish brown was the predominant color of both mature and immature adults during all year. Adults were parasitized by Hexacladia smithii (Ashmead) (Hymenoptera: Encyrtidae) and Tachinidae mainly Trichopoda giacomellii (Blanchard) (Diptera: Tachinidae) (80% and 40% of parasitism in male and female, respectively) during summer (December), when the bugs colonized sunflower. In soybean, 12% of males and 10% of females were parasitized, whereas in fallen leaves, the parasitism rate was 5% in both sexes.These results showed that in autumn/winter (shorter photoperiod) the majority of the insects were inactive under fallen leaves, showing immature reproductive organs and less developed shoulders, indicating that, at this time, these bugs were in diapause.

scholarly journals Level of anxiety among a sample of battered women in Gaza governorates: مستوى القلق لدى عينة من السيدات المعنفات بمحافظات غزة

2020 ◽  
Vol 4 (29) ◽  
Author(s):  
Alaa Maher Elshafie
Keyword(s):  
Statistical Analysis ◽  
Battered Women ◽  
Communication Skills ◽  
Pearson Correlation ◽  
Depression Scale ◽  
Anxiety And Depression ◽  
Marital Communication ◽  
Training Courses ◽  
The Relationship ◽  
Descriptive Method

The current study aimed to identify the level of anxiety and depression among a sample of battered women in the governorates of Gaza, and to uncover the relationship between anxiety and depression after the statistical analysis, The study used the descriptive method, and the study sample consisted of (130) battered women who are married and registered with the institutions and associations concerned with that category at the level of Gaza governorates. And to achieve the goals of the study, the researcher developed the anxiety scale and used the Depression Scale (Labik) (Al-Hussein, translation: Ahmed Abdel-Khalek, 2002). The results revealed that the level of anxiety among battered women in the governorates of Gaza was "average", and that the level of depression among them was high, and that the Pearson correlation between anxiety and depression was equal to (0.85), which is a direct correlation coefficient statistically significant at the level of (0.01), which means that whenever Increased anxiety increased depression. The researcher recommends the need to apply counseling programs to both husbands and wives in developing marital communication skills. Conducting training courses for those who are about to get married to learn how to manage marital life, and know the rights and duties.

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